140 CONCHOLOGY. 



Sliell. Oblong, convex, distinguished from the Cypraea by the 

 want of a spire, and by not having teeth on the columellar lip ; 

 the two extremities of the aperture notched, and more or less pro- 

 longed like a tube ; left margin dentatcd. Inhabits the Indian 

 seas. Twelve species. 



Ovula oviformis. Ovula carnea. 



O. verrucosa, 0. gibbosa. 



O. spelta. O. volva. 



O. angulosa. O. lactea. 



O. hordacea. O. triticea. 



O. birostris. O. acicularis. 



3. Genus Terebellum. PI. XI 1. 

 Animal. Entirely unknown. 



Shell. Thin, shining, subcylindrical, involute, pointed poste- 

 riorly, truncated anteriorly ; aperture longitudinal, triangular ; 

 edges entire, columella truncated and prolonged beyond the aper- 

 ture. Inhabits the Indian Ocean. One living species and two 



fossil. 



Terebellum subulatum. 



4. Genus Aiicillaria. PI. Xlf. 



Animal. Unknown. 



Shell. Smooth, oval, oblong, posteriorly, widened and trun- 

 cated anteriorly; aperture oval, somewhat elongated, angular 

 posteriorly ; a wide but not deep slope anteriorly ; columella 

 covered anteriorly with an oblique callous band ; right lip obtuse. 

 Inhabits the Australian seas. Four living species, and five 

 fossil. 



Ancillaria cinnamonea. Ancillaria Candida. 

 A. ventricosa. A. marginata. 



5. Genus Oliva. PI. XII. 

 Animal. Oval, involute, mouth somewhat thin at its edges, 

 prolonged to the two angles of the branchial aperture in a tenta- 

 cular band, and, anteriorly, by a long branchial tube ; foot very 

 large, oval, subauriculated, with a transverse cleft anteriorly ; 

 head small with a labial proboscis. 



